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Patented May l6, I899. J. CHRISTIE. BEAM SHEABS.

(Application filed Dec. 3, 1897. (No Model.)

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no. 625,289. Patented May l6, I899.

J. CHRISTIE. I

BEAM SHEABS.

(Application filed Dec. 3, 1897.) (No Model.) 3 Sheets-Shoet 2.

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Patented May l6, I899.

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SHEAR J. CHRISTIE BEAM (Application fll (No Model) l E w 6 I Q e winesses UNITED STATES PATENT OFFICE.

JAMES CHRISTIE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE A. & P.ROBERTS COMPANY, OF SAME PLACE.

B EAM-SHEARS.

SPECIFICATION forming part of Letters Patent No. 625,289, dated May 16,1899. Application filed December 3, 1897. Serial No. 660,653. (Nomodel.)

To all whom it may concern:

, Be it known that 1, JAMES CHRISTIE, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Beam-Shears, of which the following is a specification.

My invention relates particularly to certain improvements in machinesfor shearing I-beams, channels, &c.; and the main object of my inventionis to so construct the machine as to positively shear the beam in oneoperation, to clamp the beam during the shearing process, and to securethe upper blade rigidly to its plunger or slide. These objects I attainin the following manner, reference being had to the accompanyingdrawings, in which Figure 1 is a front elevation of myimproved machine.Fig. 2 is a section on the line 2 2, Fig. 1. Fig. 3 is a section on theline 3 3, Fig. 1. Fig. 4 is an enlarged section on the line 4 4, Fig. 1.Fig. 5 is an enlarged view of the upper blade. Fig. 6 is a sectionalplan view showing the lower blades, and Fig. 7 is a perspective view ofone of the side blocks.

A is the frame of the machine, having the base A, on which rest the twoblocks B B, carrying the two lower blades 1) b. The upper face of eachblock is slightly rounded toward the edge of the blade, so that the beamwill rest on the cutting edges of the lower blades.

D D are sliding side blocks extending above the upper face of the blocksB B and are adapted to clamp the beam laterally when placed in positionin the machine. Mechanism is provided to adjust these blocks so as tofirmly clamp the beam during the cutting process. In the presentinstance the rear edge of each block is beveled, and between each blockand a projection on the frame are inserted wedges E E. Each wedge isconnected to a piston-rod e of a fluid-pressure cylinder E, so that whenfluid is admitted to both cylinders both wedges are forced forward,moving the blocks D D laterally against the I-beam.

c are adjustable stops on the slide-plate to limit the forward movementof the wedges, so that if one wedge should move faster than the other itwill be stopped when it reaches a certain point and the other will moveuntil it reaches its stop, so that the two side blocks will confine thebeam centrally in the machine.

Each block D is notched at the forward end, and in the notch are placedcutting-knives d (1, arranged on a bevel, so as to free the upper bladewhen it passes through the flanges of the beam. In order to release thebeam after it is sheared, I provide springs d, which rest in pockets inthe side portions of the frame and bear againstlugs d on the blocks, sothat when the blocks are relieved from the pressure of the wedges theywill open automatically and release the beam, which can then be removed.All the lower knives are detachably secured by means of bolts, so thatwhen worn they can be removed or resharpened.

The frame carries at its upper end a fluidpressure cylinder F, to whichthe plunger G of the slide G is adapted. The slide G is mounted insuitable ways a a. on the frame A and has a recess g, in which rests atwopart frame G This frame is secured in any suitable manner to theslide, and its inner edges are planed oft true, so as to receive thehead of the upper blade I, whichis made, preferably, in the form shownin Fig. 1. The blade is secured to the frame and slide in the presentinstance by bolts g, which pass through the plate, block, and plunger.

Between one part of the frame and the slide is a wedge The wall of therecess in the slide is slightly tapered, and bolts 9 are used to forcethe wedge into the recess, thus forcing the frame firmly against theblade, after which the securing-bolts g are tightened. Thus the blade isrigidly secured to the slide. The holes in the blade and frame aresomewhat larger than the bolts, so as to allow for the adjustment.

The lower cutting edge 2 of the blade I is curved, as shown, so that itwill commence to cut at the edges of the web of the beam before cuttingthe center, and while it is cutting the center the inclined cuttingedges 2" will cut the upper flanges of the beam, and as the bladecontinues its movement the web will be entirely severed and the cuttingof the lower fianges will be completed, the beam being held rigidlyduring the cutting by the side blocks D D.

The plunger is connected by rods h h to a cross-head H of a plunger H,adapted to a cylinder F, so that on turning suitable valves the plungerwill be returned by the fluid in the small cylinder. This form ofapparatus for returning the plunger forms no part of the 2. Thecombinationin a machine for shearing beams, of an upper blade, sideblocks, blades thereon, wedges back of each side block, hydrauliccylinders, pistons therefor connected to the wedges, substantially asdescribed.

3. The combination in a machine for shearing beams, of a base, bladesthereon, adjustable side blocks having beveled backs,blades carried bysaid blocks, slide-plates, wedges resting between the beveled backs ofthe blocks and the slide-plates, an upper blade,

and means for operating said blade to cut the beam clamped between theside blocks, substantially as described.

4. The combination in a machine for shearing beams, of a frame, twoblades thereon arranged side by side, two adjustable side blocks, eachblock notched at its forward end and beveled at the back, blades on eachblock at each side of the notch, wedges for moving said blocks to clampthe beams, cylinders on the frame, piston and piston-rods adapted tosaid cylinders and connected to the wedges, and an upper blade adaptedto the space between the two setsof lower blades so that the upper bladein cutting will remove a nar= row strip from the beam, substantially asdescribed.

5. The combination in a shearingmachine, of a recessed slide, a two-partframe adapted to the recess in the slide and also recessed, aknife-blade adapted to said recess and secured to the two-part frame andslide, and means for laterally forcing the frame against the blade,substantially as described.

6. The combination in ashearing machine, of a slide having a recesstherein, a recessed frame adapted to the recess in the slide, a bladeadapted to the recess in the frame, a wedge between one side of theframe and the slide and adapted to force the frame against the blade,substantially as specified.

7. The combination in a shearing-machine, of a slide having a recesstherein, a two-part recessed frame adapted to the recess in the slide, ablade mounted in the recess in the frame, a wedge mounted between theone side of the frame and the slide, bolts securing the wedge to theslide and bolts securing the blade and frame to the slide, substantiallyas described.

8. The combination ina machine for shearing beams, of the lower blades,blocks carrying the lower blades, sliding side blocks carrying sideblades, wedges back of the said So blocks,means for moving said wedges,springs restingin pockets in the frame bearing against the said blocksso as to force the blocks away from the beam after it is cut when thewedges are released, substantially as described.

9. The combination in a machine for shearin g beams, of blocks earringthe lower blades, sliding side blocks carrying the side blades, the saidblocks being beveled, wedges adapted to force the side blocks forward toclamp the 0 beam, and means for moving'the said wedges and stops tolimit the movement, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES CHRISTIE.

Witnesses:

WILL. A. BARR, J os. H. KLEIN.

